/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 21:35:22,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 21:35:22,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 21:35:22,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 21:35:22,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 21:35:22,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 21:35:22,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 21:35:22,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 21:35:22,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 21:35:22,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 21:35:22,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 21:35:22,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 21:35:22,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 21:35:22,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 21:35:22,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 21:35:22,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 21:35:22,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 21:35:22,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 21:35:22,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 21:35:22,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 21:35:22,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 21:35:22,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 21:35:22,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 21:35:22,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 21:35:22,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 21:35:22,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 21:35:22,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 21:35:22,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 21:35:22,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 21:35:22,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 21:35:22,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 21:35:22,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 21:35:22,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 21:35:22,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 21:35:22,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 21:35:22,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 21:35:22,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 21:35:22,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 21:35:22,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 21:35:22,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 21:35:22,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 21:35:22,924 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-05 21:35:22,949 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 21:35:22,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 21:35:22,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 21:35:22,950 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 21:35:22,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 21:35:22,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 21:35:22,951 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 21:35:22,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 21:35:22,952 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 21:35:22,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 21:35:22,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 21:35:22,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 21:35:22,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 21:35:22,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 21:35:22,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 21:35:22,953 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 21:35:22,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 21:35:22,953 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 21:35:22,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 21:35:22,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 21:35:22,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 21:35:22,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 21:35:22,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 21:35:22,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:35:22,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 21:35:22,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 21:35:22,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 21:35:22,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 21:35:22,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 21:35:22,954 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 21:35:22,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 21:35:23,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 21:35:23,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 21:35:23,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 21:35:23,228 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 21:35:23,229 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 21:35:23,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2022-12-05 21:35:24,200 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 21:35:24,396 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 21:35:24,396 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2022-12-05 21:35:24,413 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/472c2113a/85019019552b473f8a4e6da3a0489d38/FLAGf83881183 [2022-12-05 21:35:24,427 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/472c2113a/85019019552b473f8a4e6da3a0489d38 [2022-12-05 21:35:24,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 21:35:24,430 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 21:35:24,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 21:35:24,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 21:35:24,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 21:35:24,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:35:24" (1/1) ... [2022-12-05 21:35:24,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52731e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:24, skipping insertion in model container [2022-12-05 21:35:24,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:35:24" (1/1) ... [2022-12-05 21:35:24,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 21:35:24,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 21:35:24,557 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:35:24,557 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:35:24,559 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:35:24,560 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:35:24,566 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2121,2134] [2022-12-05 21:35:24,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:35:24,579 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 21:35:24,592 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:35:24,593 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:35:24,595 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:35:24,596 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:35:24,603 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2121,2134] [2022-12-05 21:35:24,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:35:24,618 INFO L208 MainTranslator]: Completed translation [2022-12-05 21:35:24,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:24 WrapperNode [2022-12-05 21:35:24,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 21:35:24,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 21:35:24,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 21:35:24,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 21:35:24,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:24" (1/1) ... [2022-12-05 21:35:24,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:24" (1/1) ... [2022-12-05 21:35:24,649 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-12-05 21:35:24,649 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 21:35:24,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 21:35:24,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 21:35:24,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 21:35:24,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:24" (1/1) ... [2022-12-05 21:35:24,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:24" (1/1) ... [2022-12-05 21:35:24,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:24" (1/1) ... [2022-12-05 21:35:24,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:24" (1/1) ... [2022-12-05 21:35:24,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:24" (1/1) ... [2022-12-05 21:35:24,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:24" (1/1) ... [2022-12-05 21:35:24,677 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:24" (1/1) ... [2022-12-05 21:35:24,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:24" (1/1) ... [2022-12-05 21:35:24,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 21:35:24,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 21:35:24,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 21:35:24,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 21:35:24,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:24" (1/1) ... [2022-12-05 21:35:24,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:35:24,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:24,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-05 21:35:24,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-05 21:35:24,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 21:35:24,734 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 21:35:24,734 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 21:35:24,734 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 21:35:24,734 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 21:35:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 21:35:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 21:35:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 21:35:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 21:35:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 21:35:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 21:35:24,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 21:35:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 21:35:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 21:35:24,737 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 21:35:24,846 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 21:35:24,847 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 21:35:24,956 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 21:35:24,992 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 21:35:24,992 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-05 21:35:24,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:35:24 BoogieIcfgContainer [2022-12-05 21:35:24,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 21:35:24,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 21:35:24,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 21:35:24,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 21:35:25,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:35:24" (1/3) ... [2022-12-05 21:35:25,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d709168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:35:25, skipping insertion in model container [2022-12-05 21:35:25,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:35:24" (2/3) ... [2022-12-05 21:35:25,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d709168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:35:25, skipping insertion in model container [2022-12-05 21:35:25,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:35:24" (3/3) ... [2022-12-05 21:35:25,001 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-12-05 21:35:25,014 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 21:35:25,014 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 21:35:25,015 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 21:35:25,049 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 21:35:25,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 176 flow [2022-12-05 21:35:25,109 INFO L130 PetriNetUnfolder]: 6/78 cut-off events. [2022-12-05 21:35:25,110 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:35:25,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 6/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2022-12-05 21:35:25,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 80 transitions, 176 flow [2022-12-05 21:35:25,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 70 transitions, 152 flow [2022-12-05 21:35:25,117 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 21:35:25,128 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 70 transitions, 152 flow [2022-12-05 21:35:25,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 70 transitions, 152 flow [2022-12-05 21:35:25,146 INFO L130 PetriNetUnfolder]: 6/70 cut-off events. [2022-12-05 21:35:25,146 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:35:25,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 70 events. 6/70 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2022-12-05 21:35:25,148 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 70 transitions, 152 flow [2022-12-05 21:35:25,148 INFO L188 LiptonReduction]: Number of co-enabled transitions 500 [2022-12-05 21:35:26,989 INFO L203 LiptonReduction]: Total number of compositions: 55 [2022-12-05 21:35:27,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 21:35:27,020 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@31ad0728, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 21:35:27,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 21:35:27,029 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-05 21:35:27,029 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:35:27,029 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:27,031 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:27,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:27,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:27,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1374975466, now seen corresponding path program 1 times [2022-12-05 21:35:27,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:27,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307842528] [2022-12-05 21:35:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:27,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:27,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:27,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307842528] [2022-12-05 21:35:27,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307842528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:35:27,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:35:27,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-05 21:35:27,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305046902] [2022-12-05 21:35:27,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:35:27,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 21:35:27,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:27,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 21:35:27,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 21:35:27,484 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:35:27,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:27,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:27,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:35:27,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:27,544 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2022-12-05 21:35:27,544 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-05 21:35:27,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 267 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2022-12-05 21:35:27,546 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2022-12-05 21:35:27,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2022-12-05 21:35:27,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 21:35:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 21:35:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 30 transitions. [2022-12-05 21:35:27,554 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2022-12-05 21:35:27,556 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 30 transitions. [2022-12-05 21:35:27,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2022-12-05 21:35:27,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 21:35:27,560 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2022-12-05 21:35:27,561 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2022-12-05 21:35:27,565 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2022-12-05 21:35:27,565 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2022-12-05 21:35:27,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:27,565 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:27,565 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:27,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 21:35:27,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:27,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:27,566 INFO L85 PathProgramCache]: Analyzing trace with hash -867956374, now seen corresponding path program 1 times [2022-12-05 21:35:27,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:27,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802358880] [2022-12-05 21:35:27,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:27,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:27,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:27,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802358880] [2022-12-05 21:35:27,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802358880] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:35:27,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:35:27,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:35:27,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045467477] [2022-12-05 21:35:27,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:35:27,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:35:27,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:27,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:35:27,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:35:27,694 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:27,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:27,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:27,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:27,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:27,785 INFO L130 PetriNetUnfolder]: 72/149 cut-off events. [2022-12-05 21:35:27,785 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-12-05 21:35:27,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 149 events. 72/149 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 467 event pairs, 24 based on Foata normal form. 6/155 useless extension candidates. Maximal degree in co-relation 177. Up to 78 conditions per place. [2022-12-05 21:35:27,786 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 28 selfloop transitions, 3 changer transitions 6/37 dead transitions. [2022-12-05 21:35:27,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 37 transitions, 178 flow [2022-12-05 21:35:27,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:35:27,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:35:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 37 transitions. [2022-12-05 21:35:27,787 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2022-12-05 21:35:27,787 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 37 transitions. [2022-12-05 21:35:27,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 37 transitions, 178 flow [2022-12-05 21:35:27,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 37 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:35:27,788 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 74 flow [2022-12-05 21:35:27,788 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2022-12-05 21:35:27,789 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2022-12-05 21:35:27,789 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 74 flow [2022-12-05 21:35:27,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:27,789 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:27,789 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:27,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 21:35:27,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:27,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1630038052, now seen corresponding path program 2 times [2022-12-05 21:35:27,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:27,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696573159] [2022-12-05 21:35:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:27,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:27,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:27,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696573159] [2022-12-05 21:35:27,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696573159] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:27,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490588510] [2022-12-05 21:35:27,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:35:27,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:27,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:27,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:27,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 21:35:27,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:35:27,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:27,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:35:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:27,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:28,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490588510] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:28,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:35:28,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2022-12-05 21:35:28,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293533764] [2022-12-05 21:35:28,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:35:28,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:35:28,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:28,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:35:28,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-05 21:35:28,034 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-05 21:35:28,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:28,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:28,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-05 21:35:28,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:28,098 INFO L130 PetriNetUnfolder]: 72/143 cut-off events. [2022-12-05 21:35:28,101 INFO L131 PetriNetUnfolder]: For 140/144 co-relation queries the response was YES. [2022-12-05 21:35:28,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 143 events. 72/143 cut-off events. For 140/144 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 428 event pairs, 28 based on Foata normal form. 6/145 useless extension candidates. Maximal degree in co-relation 112. Up to 86 conditions per place. [2022-12-05 21:35:28,102 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 24 selfloop transitions, 3 changer transitions 5/33 dead transitions. [2022-12-05 21:35:28,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 188 flow [2022-12-05 21:35:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:35:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:35:28,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 35 transitions. [2022-12-05 21:35:28,103 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2022-12-05 21:35:28,103 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 74 flow. Second operand 4 states and 35 transitions. [2022-12-05 21:35:28,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 188 flow [2022-12-05 21:35:28,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 33 transitions, 178 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-05 21:35:28,105 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 93 flow [2022-12-05 21:35:28,105 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2022-12-05 21:35:28,106 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2022-12-05 21:35:28,106 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 93 flow [2022-12-05 21:35:28,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:28,106 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:28,106 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:28,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:28,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:28,313 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash -957876050, now seen corresponding path program 3 times [2022-12-05 21:35:28,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:28,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959580961] [2022-12-05 21:35:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:28,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:28,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:28,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959580961] [2022-12-05 21:35:28,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959580961] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:28,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817983481] [2022-12-05 21:35:28,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:35:28,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:28,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:28,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:28,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 21:35:28,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:35:28,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:28,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:35:28,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:28,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:28,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817983481] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:28,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:28,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-05 21:35:28,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942056333] [2022-12-05 21:35:28,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:28,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:35:28,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:28,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:35:28,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-05 21:35:28,519 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:28,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:28,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:28,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:28,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:28,640 INFO L130 PetriNetUnfolder]: 102/203 cut-off events. [2022-12-05 21:35:28,641 INFO L131 PetriNetUnfolder]: For 281/281 co-relation queries the response was YES. [2022-12-05 21:35:28,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 203 events. 102/203 cut-off events. For 281/281 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 689 event pairs, 30 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 237. Up to 104 conditions per place. [2022-12-05 21:35:28,646 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 33 selfloop transitions, 11 changer transitions 11/55 dead transitions. [2022-12-05 21:35:28,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 334 flow [2022-12-05 21:35:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:35:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:35:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 53 transitions. [2022-12-05 21:35:28,649 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2022-12-05 21:35:28,649 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 93 flow. Second operand 7 states and 53 transitions. [2022-12-05 21:35:28,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 334 flow [2022-12-05 21:35:28,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:35:28,653 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 165 flow [2022-12-05 21:35:28,653 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2022-12-05 21:35:28,654 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2022-12-05 21:35:28,654 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 165 flow [2022-12-05 21:35:28,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:28,654 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:28,654 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:28,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:28,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-05 21:35:28,858 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:28,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:28,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1336694456, now seen corresponding path program 4 times [2022-12-05 21:35:28,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:28,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703496586] [2022-12-05 21:35:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:28,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:28,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:28,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703496586] [2022-12-05 21:35:28,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703496586] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:28,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385753908] [2022-12-05 21:35:28,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:35:28,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:28,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:28,920 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:28,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 21:35:28,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:35:28,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:28,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:35:29,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:29,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:29,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385753908] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:29,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:29,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-05 21:35:29,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062385369] [2022-12-05 21:35:29,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:29,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 21:35:29,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:29,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 21:35:29,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-05 21:35:29,051 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:29,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:29,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:29,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:29,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:29,127 INFO L130 PetriNetUnfolder]: 96/189 cut-off events. [2022-12-05 21:35:29,128 INFO L131 PetriNetUnfolder]: For 459/459 co-relation queries the response was YES. [2022-12-05 21:35:29,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 189 events. 96/189 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 617 event pairs, 28 based on Foata normal form. 6/195 useless extension candidates. Maximal degree in co-relation 486. Up to 96 conditions per place. [2022-12-05 21:35:29,129 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 25 selfloop transitions, 11 changer transitions 7/43 dead transitions. [2022-12-05 21:35:29,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 312 flow [2022-12-05 21:35:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:35:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:35:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 38 transitions. [2022-12-05 21:35:29,130 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2022-12-05 21:35:29,130 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 165 flow. Second operand 5 states and 38 transitions. [2022-12-05 21:35:29,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 312 flow [2022-12-05 21:35:29,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 298 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-05 21:35:29,132 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 179 flow [2022-12-05 21:35:29,132 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2022-12-05 21:35:29,132 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2022-12-05 21:35:29,133 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 179 flow [2022-12-05 21:35:29,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:29,133 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:29,133 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:29,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:29,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:29,337 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:29,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:29,338 INFO L85 PathProgramCache]: Analyzing trace with hash -621682641, now seen corresponding path program 1 times [2022-12-05 21:35:29,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:29,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051598316] [2022-12-05 21:35:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:29,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:29,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:29,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051598316] [2022-12-05 21:35:29,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051598316] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:29,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953267853] [2022-12-05 21:35:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:29,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:29,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:29,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:29,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 21:35:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:29,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-05 21:35:29,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:29,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:29,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953267853] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:29,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:29,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2022-12-05 21:35:29,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508397756] [2022-12-05 21:35:29,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:29,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 21:35:29,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:29,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 21:35:29,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-05 21:35:29,546 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:35:29,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:29,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:29,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:35:29,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:29,606 INFO L130 PetriNetUnfolder]: 122/237 cut-off events. [2022-12-05 21:35:29,606 INFO L131 PetriNetUnfolder]: For 504/521 co-relation queries the response was YES. [2022-12-05 21:35:29,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 237 events. 122/237 cut-off events. For 504/521 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 879 event pairs, 20 based on Foata normal form. 17/247 useless extension candidates. Maximal degree in co-relation 670. Up to 111 conditions per place. [2022-12-05 21:35:29,607 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2022-12-05 21:35:29,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 374 flow [2022-12-05 21:35:29,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:35:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:35:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2022-12-05 21:35:29,608 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2022-12-05 21:35:29,608 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 179 flow. Second operand 4 states and 43 transitions. [2022-12-05 21:35:29,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 374 flow [2022-12-05 21:35:29,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 331 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-12-05 21:35:29,610 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 254 flow [2022-12-05 21:35:29,610 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2022-12-05 21:35:29,611 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2022-12-05 21:35:29,611 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 254 flow [2022-12-05 21:35:29,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:29,611 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:29,611 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:29,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-05 21:35:29,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:29,816 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:29,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:29,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1940050999, now seen corresponding path program 2 times [2022-12-05 21:35:29,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:29,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358331663] [2022-12-05 21:35:29,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:29,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:29,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:29,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358331663] [2022-12-05 21:35:29,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358331663] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:29,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869213948] [2022-12-05 21:35:29,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:35:29,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:29,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:29,916 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:29,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 21:35:29,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:35:29,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:29,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:35:29,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:30,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:30,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869213948] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:30,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:30,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-05 21:35:30,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120416381] [2022-12-05 21:35:30,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:30,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 21:35:30,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:30,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 21:35:30,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-05 21:35:30,109 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:30,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 254 flow. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:30,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:30,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:30,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:30,751 INFO L130 PetriNetUnfolder]: 353/729 cut-off events. [2022-12-05 21:35:30,751 INFO L131 PetriNetUnfolder]: For 1336/1336 co-relation queries the response was YES. [2022-12-05 21:35:30,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2579 conditions, 729 events. 353/729 cut-off events. For 1336/1336 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3774 event pairs, 10 based on Foata normal form. 16/745 useless extension candidates. Maximal degree in co-relation 1446. Up to 239 conditions per place. [2022-12-05 21:35:30,755 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 110 selfloop transitions, 63 changer transitions 44/217 dead transitions. [2022-12-05 21:35:30,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 217 transitions, 1575 flow [2022-12-05 21:35:30,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-05 21:35:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-05 21:35:30,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 190 transitions. [2022-12-05 21:35:30,757 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2022-12-05 21:35:30,757 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 254 flow. Second operand 32 states and 190 transitions. [2022-12-05 21:35:30,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 217 transitions, 1575 flow [2022-12-05 21:35:30,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 217 transitions, 1533 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-12-05 21:35:30,762 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 898 flow [2022-12-05 21:35:30,762 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=898, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2022-12-05 21:35:30,763 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2022-12-05 21:35:30,763 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 898 flow [2022-12-05 21:35:30,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:30,763 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:30,763 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:30,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:30,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:30,972 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:30,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:30,972 INFO L85 PathProgramCache]: Analyzing trace with hash -489833203, now seen corresponding path program 3 times [2022-12-05 21:35:30,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:30,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502392792] [2022-12-05 21:35:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:30,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:31,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:31,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502392792] [2022-12-05 21:35:31,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502392792] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:31,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646817308] [2022-12-05 21:35:31,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:35:31,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:31,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:31,050 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:31,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 21:35:31,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:35:31,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:31,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:35:31,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:31,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:31,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646817308] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:31,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:31,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-12-05 21:35:31,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085384119] [2022-12-05 21:35:31,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:31,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:35:31,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:31,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:35:31,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:35:31,177 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:31,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 898 flow. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:31,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:31,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:31,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:31,439 INFO L130 PetriNetUnfolder]: 319/640 cut-off events. [2022-12-05 21:35:31,439 INFO L131 PetriNetUnfolder]: For 3924/3924 co-relation queries the response was YES. [2022-12-05 21:35:31,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3315 conditions, 640 events. 319/640 cut-off events. For 3924/3924 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3097 event pairs, 33 based on Foata normal form. 18/658 useless extension candidates. Maximal degree in co-relation 2854. Up to 294 conditions per place. [2022-12-05 21:35:31,444 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 103 selfloop transitions, 35 changer transitions 0/138 dead transitions. [2022-12-05 21:35:31,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 138 transitions, 1517 flow [2022-12-05 21:35:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:35:31,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:35:31,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 69 transitions. [2022-12-05 21:35:31,445 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.46 [2022-12-05 21:35:31,445 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 898 flow. Second operand 10 states and 69 transitions. [2022-12-05 21:35:31,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 138 transitions, 1517 flow [2022-12-05 21:35:31,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 138 transitions, 1205 flow, removed 121 selfloop flow, removed 6 redundant places. [2022-12-05 21:35:31,456 INFO L231 Difference]: Finished difference. Result has 80 places, 97 transitions, 851 flow [2022-12-05 21:35:31,457 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=851, PETRI_PLACES=80, PETRI_TRANSITIONS=97} [2022-12-05 21:35:31,457 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2022-12-05 21:35:31,457 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 97 transitions, 851 flow [2022-12-05 21:35:31,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:31,457 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:31,457 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:31,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:31,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:31,662 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:31,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1736851289, now seen corresponding path program 4 times [2022-12-05 21:35:31,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:31,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744210862] [2022-12-05 21:35:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:31,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:31,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:31,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744210862] [2022-12-05 21:35:31,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744210862] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:31,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545567989] [2022-12-05 21:35:31,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:35:31,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:31,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:31,756 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:31,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 21:35:31,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:35:31,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:31,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:35:31,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:31,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:31,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545567989] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:31,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:31,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-05 21:35:31,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178540266] [2022-12-05 21:35:31,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:31,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 21:35:31,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:31,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 21:35:31,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-05 21:35:31,913 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:31,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 97 transitions, 851 flow. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:31,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:31,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:31,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:32,329 INFO L130 PetriNetUnfolder]: 403/794 cut-off events. [2022-12-05 21:35:32,329 INFO L131 PetriNetUnfolder]: For 8263/8263 co-relation queries the response was YES. [2022-12-05 21:35:32,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4142 conditions, 794 events. 403/794 cut-off events. For 8263/8263 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4066 event pairs, 39 based on Foata normal form. 48/842 useless extension candidates. Maximal degree in co-relation 3658. Up to 350 conditions per place. [2022-12-05 21:35:32,334 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 126 selfloop transitions, 66 changer transitions 0/192 dead transitions. [2022-12-05 21:35:32,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 192 transitions, 1892 flow [2022-12-05 21:35:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-05 21:35:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-05 21:35:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 115 transitions. [2022-12-05 21:35:32,336 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2022-12-05 21:35:32,336 INFO L175 Difference]: Start difference. First operand has 80 places, 97 transitions, 851 flow. Second operand 18 states and 115 transitions. [2022-12-05 21:35:32,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 192 transitions, 1892 flow [2022-12-05 21:35:32,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 192 transitions, 1745 flow, removed 55 selfloop flow, removed 4 redundant places. [2022-12-05 21:35:32,352 INFO L231 Difference]: Finished difference. Result has 100 places, 128 transitions, 1354 flow [2022-12-05 21:35:32,353 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1354, PETRI_PLACES=100, PETRI_TRANSITIONS=128} [2022-12-05 21:35:32,353 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 80 predicate places. [2022-12-05 21:35:32,353 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 128 transitions, 1354 flow [2022-12-05 21:35:32,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:32,353 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:32,353 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:32,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:32,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:32,558 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:32,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:32,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1569939145, now seen corresponding path program 5 times [2022-12-05 21:35:32,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:32,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352558158] [2022-12-05 21:35:32,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:32,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:32,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:32,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352558158] [2022-12-05 21:35:32,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352558158] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:32,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242774361] [2022-12-05 21:35:32,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:35:32,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:32,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:32,647 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:32,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-05 21:35:32,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:35:32,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:32,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:35:32,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:32,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:32,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242774361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:32,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:32,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-12-05 21:35:32,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044232815] [2022-12-05 21:35:32,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:32,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 21:35:32,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:32,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 21:35:32,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-05 21:35:32,834 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:32,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 128 transitions, 1354 flow. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:32,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:32,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:32,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:33,397 INFO L130 PetriNetUnfolder]: 486/967 cut-off events. [2022-12-05 21:35:33,397 INFO L131 PetriNetUnfolder]: For 17715/17715 co-relation queries the response was YES. [2022-12-05 21:35:33,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6004 conditions, 967 events. 486/967 cut-off events. For 17715/17715 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5286 event pairs, 32 based on Foata normal form. 30/997 useless extension candidates. Maximal degree in co-relation 5440. Up to 262 conditions per place. [2022-12-05 21:35:33,404 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 95 selfloop transitions, 110 changer transitions 5/210 dead transitions. [2022-12-05 21:35:33,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 210 transitions, 2370 flow [2022-12-05 21:35:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 21:35:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 21:35:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 85 transitions. [2022-12-05 21:35:33,405 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2022-12-05 21:35:33,405 INFO L175 Difference]: Start difference. First operand has 100 places, 128 transitions, 1354 flow. Second operand 14 states and 85 transitions. [2022-12-05 21:35:33,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 210 transitions, 2370 flow [2022-12-05 21:35:33,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 210 transitions, 2096 flow, removed 103 selfloop flow, removed 7 redundant places. [2022-12-05 21:35:33,475 INFO L231 Difference]: Finished difference. Result has 110 places, 156 transitions, 1797 flow [2022-12-05 21:35:33,475 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1797, PETRI_PLACES=110, PETRI_TRANSITIONS=156} [2022-12-05 21:35:33,476 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 90 predicate places. [2022-12-05 21:35:33,476 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 156 transitions, 1797 flow [2022-12-05 21:35:33,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:33,476 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:33,476 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:33,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:33,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-05 21:35:33,683 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:33,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:33,684 INFO L85 PathProgramCache]: Analyzing trace with hash -826982149, now seen corresponding path program 6 times [2022-12-05 21:35:33,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:33,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032923395] [2022-12-05 21:35:33,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:33,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:33,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:33,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032923395] [2022-12-05 21:35:33,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032923395] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:33,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584946878] [2022-12-05 21:35:33,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:35:33,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:33,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:33,763 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:33,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-05 21:35:33,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 21:35:33,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:33,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:35:33,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:33,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:33,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584946878] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:33,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:33,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-12-05 21:35:33,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949612915] [2022-12-05 21:35:33,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:33,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:35:33,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:33,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:35:33,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:35:33,923 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:33,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 156 transitions, 1797 flow. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:33,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:33,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:33,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:34,586 INFO L130 PetriNetUnfolder]: 725/1434 cut-off events. [2022-12-05 21:35:34,586 INFO L131 PetriNetUnfolder]: For 34156/34156 co-relation queries the response was YES. [2022-12-05 21:35:34,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9700 conditions, 1434 events. 725/1434 cut-off events. For 34156/34156 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8742 event pairs, 162 based on Foata normal form. 100/1534 useless extension candidates. Maximal degree in co-relation 9125. Up to 832 conditions per place. [2022-12-05 21:35:34,597 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 217 selfloop transitions, 126 changer transitions 3/346 dead transitions. [2022-12-05 21:35:34,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 346 transitions, 4461 flow [2022-12-05 21:35:34,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-05 21:35:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-05 21:35:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 155 transitions. [2022-12-05 21:35:34,598 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2022-12-05 21:35:34,598 INFO L175 Difference]: Start difference. First operand has 110 places, 156 transitions, 1797 flow. Second operand 24 states and 155 transitions. [2022-12-05 21:35:34,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 346 transitions, 4461 flow [2022-12-05 21:35:34,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 346 transitions, 3772 flow, removed 318 selfloop flow, removed 8 redundant places. [2022-12-05 21:35:34,691 INFO L231 Difference]: Finished difference. Result has 138 places, 227 transitions, 2984 flow [2022-12-05 21:35:34,691 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2984, PETRI_PLACES=138, PETRI_TRANSITIONS=227} [2022-12-05 21:35:34,692 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 118 predicate places. [2022-12-05 21:35:34,692 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 227 transitions, 2984 flow [2022-12-05 21:35:34,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:34,692 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:34,692 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:34,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:34,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:34,899 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1861733983, now seen corresponding path program 7 times [2022-12-05 21:35:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:34,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114395158] [2022-12-05 21:35:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:34,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:34,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:34,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114395158] [2022-12-05 21:35:34,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114395158] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:34,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577887868] [2022-12-05 21:35:34,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:35:34,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:34,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:34,998 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:35,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-05 21:35:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:35,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:35:35,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:35,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:35,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577887868] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:35,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:35,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-05 21:35:35,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392396529] [2022-12-05 21:35:35,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:35,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 21:35:35,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:35,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 21:35:35,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-12-05 21:35:35,137 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:35,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 227 transitions, 2984 flow. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:35,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:35,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:35,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:35,814 INFO L130 PetriNetUnfolder]: 860/1731 cut-off events. [2022-12-05 21:35:35,814 INFO L131 PetriNetUnfolder]: For 21413/21413 co-relation queries the response was YES. [2022-12-05 21:35:35,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11141 conditions, 1731 events. 860/1731 cut-off events. For 21413/21413 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11036 event pairs, 91 based on Foata normal form. 16/1747 useless extension candidates. Maximal degree in co-relation 10401. Up to 542 conditions per place. [2022-12-05 21:35:35,828 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 158 selfloop transitions, 184 changer transitions 6/348 dead transitions. [2022-12-05 21:35:35,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 348 transitions, 5083 flow [2022-12-05 21:35:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 21:35:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 21:35:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 118 transitions. [2022-12-05 21:35:35,831 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3575757575757576 [2022-12-05 21:35:35,831 INFO L175 Difference]: Start difference. First operand has 138 places, 227 transitions, 2984 flow. Second operand 22 states and 118 transitions. [2022-12-05 21:35:35,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 348 transitions, 5083 flow [2022-12-05 21:35:35,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 348 transitions, 4553 flow, removed 234 selfloop flow, removed 7 redundant places. [2022-12-05 21:35:35,923 INFO L231 Difference]: Finished difference. Result has 161 places, 274 transitions, 3917 flow [2022-12-05 21:35:35,923 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3917, PETRI_PLACES=161, PETRI_TRANSITIONS=274} [2022-12-05 21:35:35,924 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 141 predicate places. [2022-12-05 21:35:35,924 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 274 transitions, 3917 flow [2022-12-05 21:35:35,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:35,925 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:35,925 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:35,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:36,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-05 21:35:36,130 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:36,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1517758231, now seen corresponding path program 8 times [2022-12-05 21:35:36,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:36,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717042655] [2022-12-05 21:35:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:36,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:36,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:36,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717042655] [2022-12-05 21:35:36,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717042655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:36,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879954575] [2022-12-05 21:35:36,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:35:36,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:36,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:36,215 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:36,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-05 21:35:36,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:35:36,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:36,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:35:36,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:36,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:36,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879954575] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:36,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:36,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-12-05 21:35:36,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3021225] [2022-12-05 21:35:36,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:36,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:35:36,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:36,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:35:36,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:35:36,363 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:36,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 274 transitions, 3917 flow. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:36,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:36,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:36,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:36,880 INFO L130 PetriNetUnfolder]: 828/1658 cut-off events. [2022-12-05 21:35:36,880 INFO L131 PetriNetUnfolder]: For 26448/26448 co-relation queries the response was YES. [2022-12-05 21:35:36,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11291 conditions, 1658 events. 828/1658 cut-off events. For 26448/26448 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10432 event pairs, 191 based on Foata normal form. 36/1694 useless extension candidates. Maximal degree in co-relation 10669. Up to 856 conditions per place. [2022-12-05 21:35:36,901 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 157 selfloop transitions, 146 changer transitions 3/306 dead transitions. [2022-12-05 21:35:36,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 306 transitions, 4600 flow [2022-12-05 21:35:36,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:35:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:35:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 77 transitions. [2022-12-05 21:35:36,902 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.39487179487179486 [2022-12-05 21:35:36,902 INFO L175 Difference]: Start difference. First operand has 161 places, 274 transitions, 3917 flow. Second operand 13 states and 77 transitions. [2022-12-05 21:35:36,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 306 transitions, 4600 flow [2022-12-05 21:35:37,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 306 transitions, 4422 flow, removed 85 selfloop flow, removed 3 redundant places. [2022-12-05 21:35:37,016 INFO L231 Difference]: Finished difference. Result has 171 places, 268 transitions, 4094 flow [2022-12-05 21:35:37,017 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=3611, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4094, PETRI_PLACES=171, PETRI_TRANSITIONS=268} [2022-12-05 21:35:37,017 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 151 predicate places. [2022-12-05 21:35:37,017 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 268 transitions, 4094 flow [2022-12-05 21:35:37,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:37,018 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:37,019 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:37,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:37,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-05 21:35:37,223 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:37,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:37,224 INFO L85 PathProgramCache]: Analyzing trace with hash -282714684, now seen corresponding path program 9 times [2022-12-05 21:35:37,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:37,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173932609] [2022-12-05 21:35:37,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:37,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:37,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:37,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173932609] [2022-12-05 21:35:37,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173932609] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:37,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717634693] [2022-12-05 21:35:37,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:35:37,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:37,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:37,365 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:37,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-05 21:35:37,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 21:35:37,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:37,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-05 21:35:37,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:35:37,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:35:37,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717634693] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:37,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:37,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-12-05 21:35:37,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810929148] [2022-12-05 21:35:37,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:37,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:35:37,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:37,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:35:37,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-05 21:35:37,496 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:35:37,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 268 transitions, 4094 flow. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:37,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:37,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:35:37,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:37,814 INFO L130 PetriNetUnfolder]: 999/2055 cut-off events. [2022-12-05 21:35:37,814 INFO L131 PetriNetUnfolder]: For 35567/35577 co-relation queries the response was YES. [2022-12-05 21:35:37,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14635 conditions, 2055 events. 999/2055 cut-off events. For 35567/35577 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 14102 event pairs, 146 based on Foata normal form. 106/2159 useless extension candidates. Maximal degree in co-relation 13402. Up to 1032 conditions per place. [2022-12-05 21:35:37,831 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 232 selfloop transitions, 99 changer transitions 57/397 dead transitions. [2022-12-05 21:35:37,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 397 transitions, 6797 flow [2022-12-05 21:35:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:35:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:35:37,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2022-12-05 21:35:37,832 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7466666666666667 [2022-12-05 21:35:37,832 INFO L175 Difference]: Start difference. First operand has 171 places, 268 transitions, 4094 flow. Second operand 5 states and 56 transitions. [2022-12-05 21:35:37,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 397 transitions, 6797 flow [2022-12-05 21:35:37,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 397 transitions, 6485 flow, removed 35 selfloop flow, removed 13 redundant places. [2022-12-05 21:35:38,003 INFO L231 Difference]: Finished difference. Result has 164 places, 284 transitions, 4734 flow [2022-12-05 21:35:38,004 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=3797, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4734, PETRI_PLACES=164, PETRI_TRANSITIONS=284} [2022-12-05 21:35:38,004 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 144 predicate places. [2022-12-05 21:35:38,004 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 284 transitions, 4734 flow [2022-12-05 21:35:38,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:38,004 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:38,004 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:38,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:38,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-05 21:35:38,205 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:38,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1351127820, now seen corresponding path program 10 times [2022-12-05 21:35:38,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:38,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824682881] [2022-12-05 21:35:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:38,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:38,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:38,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824682881] [2022-12-05 21:35:38,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824682881] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:38,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445669730] [2022-12-05 21:35:38,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:35:38,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:38,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:38,342 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:38,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-05 21:35:38,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:35:38,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:38,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:35:38,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:38,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:38,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445669730] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:38,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:38,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-05 21:35:38,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141899872] [2022-12-05 21:35:38,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:38,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:35:38,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:38,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:35:38,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:35:38,513 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:38,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 284 transitions, 4734 flow. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:38,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:38,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:38,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:39,486 INFO L130 PetriNetUnfolder]: 1816/3701 cut-off events. [2022-12-05 21:35:39,486 INFO L131 PetriNetUnfolder]: For 61718/61718 co-relation queries the response was YES. [2022-12-05 21:35:39,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26842 conditions, 3701 events. 1816/3701 cut-off events. For 61718/61718 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 27820 event pairs, 219 based on Foata normal form. 72/3773 useless extension candidates. Maximal degree in co-relation 24696. Up to 1432 conditions per place. [2022-12-05 21:35:39,516 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 497 selfloop transitions, 158 changer transitions 7/662 dead transitions. [2022-12-05 21:35:39,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 662 transitions, 11579 flow [2022-12-05 21:35:39,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-05 21:35:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-05 21:35:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 118 transitions. [2022-12-05 21:35:39,517 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4627450980392157 [2022-12-05 21:35:39,517 INFO L175 Difference]: Start difference. First operand has 164 places, 284 transitions, 4734 flow. Second operand 17 states and 118 transitions. [2022-12-05 21:35:39,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 662 transitions, 11579 flow [2022-12-05 21:35:39,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 662 transitions, 11404 flow, removed 85 selfloop flow, removed 2 redundant places. [2022-12-05 21:35:39,837 INFO L231 Difference]: Finished difference. Result has 178 places, 402 transitions, 7203 flow [2022-12-05 21:35:39,837 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=4643, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7203, PETRI_PLACES=178, PETRI_TRANSITIONS=402} [2022-12-05 21:35:39,838 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 158 predicate places. [2022-12-05 21:35:39,838 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 402 transitions, 7203 flow [2022-12-05 21:35:39,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:39,838 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:39,838 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:39,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:40,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-05 21:35:40,042 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:40,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:40,042 INFO L85 PathProgramCache]: Analyzing trace with hash -272513316, now seen corresponding path program 11 times [2022-12-05 21:35:40,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:40,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941709413] [2022-12-05 21:35:40,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:40,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:40,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:40,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941709413] [2022-12-05 21:35:40,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941709413] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:40,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856427337] [2022-12-05 21:35:40,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:35:40,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:40,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:40,232 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:40,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-05 21:35:40,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-05 21:35:40,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:40,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:35:40,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:40,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:40,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856427337] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:40,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:40,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-12-05 21:35:40,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727030164] [2022-12-05 21:35:40,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:40,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 21:35:40,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:40,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 21:35:40,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-12-05 21:35:40,458 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:40,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 402 transitions, 7203 flow. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:40,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:40,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:40,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:42,740 INFO L130 PetriNetUnfolder]: 2230/4616 cut-off events. [2022-12-05 21:35:42,741 INFO L131 PetriNetUnfolder]: For 108912/108912 co-relation queries the response was YES. [2022-12-05 21:35:42,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37126 conditions, 4616 events. 2230/4616 cut-off events. For 108912/108912 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 36931 event pairs, 184 based on Foata normal form. 102/4718 useless extension candidates. Maximal degree in co-relation 33852. Up to 983 conditions per place. [2022-12-05 21:35:42,782 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 439 selfloop transitions, 441 changer transitions 30/910 dead transitions. [2022-12-05 21:35:42,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 910 transitions, 16614 flow [2022-12-05 21:35:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-05 21:35:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-05 21:35:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 282 transitions. [2022-12-05 21:35:42,783 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2022-12-05 21:35:42,784 INFO L175 Difference]: Start difference. First operand has 178 places, 402 transitions, 7203 flow. Second operand 44 states and 282 transitions. [2022-12-05 21:35:42,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 910 transitions, 16614 flow [2022-12-05 21:35:43,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 910 transitions, 16152 flow, removed 210 selfloop flow, removed 4 redundant places. [2022-12-05 21:35:43,368 INFO L231 Difference]: Finished difference. Result has 229 places, 569 transitions, 11878 flow [2022-12-05 21:35:43,368 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=6862, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=11878, PETRI_PLACES=229, PETRI_TRANSITIONS=569} [2022-12-05 21:35:43,368 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 209 predicate places. [2022-12-05 21:35:43,368 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 569 transitions, 11878 flow [2022-12-05 21:35:43,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:43,369 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:43,369 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:43,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:43,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:43,569 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:43,570 INFO L85 PathProgramCache]: Analyzing trace with hash 587463798, now seen corresponding path program 12 times [2022-12-05 21:35:43,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:43,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591867650] [2022-12-05 21:35:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:43,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:43,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:43,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591867650] [2022-12-05 21:35:43,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591867650] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:43,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380745163] [2022-12-05 21:35:43,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:35:43,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:43,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:43,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:43,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-05 21:35:43,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:35:43,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:43,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:35:43,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:43,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:43,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380745163] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:43,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:43,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-05 21:35:43,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451856457] [2022-12-05 21:35:43,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:43,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 21:35:43,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 21:35:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:35:43,888 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:43,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 569 transitions, 11878 flow. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:43,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:43,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:43,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:46,273 INFO L130 PetriNetUnfolder]: 2399/4973 cut-off events. [2022-12-05 21:35:46,273 INFO L131 PetriNetUnfolder]: For 163397/163397 co-relation queries the response was YES. [2022-12-05 21:35:46,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43920 conditions, 4973 events. 2399/4973 cut-off events. For 163397/163397 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 40485 event pairs, 275 based on Foata normal form. 112/5085 useless extension candidates. Maximal degree in co-relation 39356. Up to 1833 conditions per place. [2022-12-05 21:35:46,385 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 537 selfloop transitions, 311 changer transitions 30/878 dead transitions. [2022-12-05 21:35:46,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 878 transitions, 17777 flow [2022-12-05 21:35:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-05 21:35:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-05 21:35:46,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 213 transitions. [2022-12-05 21:35:46,391 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4057142857142857 [2022-12-05 21:35:46,391 INFO L175 Difference]: Start difference. First operand has 229 places, 569 transitions, 11878 flow. Second operand 35 states and 213 transitions. [2022-12-05 21:35:46,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 878 transitions, 17777 flow [2022-12-05 21:35:47,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 878 transitions, 16861 flow, removed 325 selfloop flow, removed 19 redundant places. [2022-12-05 21:35:47,406 INFO L231 Difference]: Finished difference. Result has 252 places, 624 transitions, 13280 flow [2022-12-05 21:35:47,406 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=11066, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13280, PETRI_PLACES=252, PETRI_TRANSITIONS=624} [2022-12-05 21:35:47,407 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 232 predicate places. [2022-12-05 21:35:47,407 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 624 transitions, 13280 flow [2022-12-05 21:35:47,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:47,407 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:47,407 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:47,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:47,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-05 21:35:47,611 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:47,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:47,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1327495836, now seen corresponding path program 13 times [2022-12-05 21:35:47,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:47,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2286403] [2022-12-05 21:35:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:47,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:47,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2286403] [2022-12-05 21:35:47,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2286403] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:47,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553662785] [2022-12-05 21:35:47,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:35:47,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:47,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:47,728 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:47,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-05 21:35:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:47,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:35:47,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:47,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:47,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553662785] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:47,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:47,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-05 21:35:47,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77146879] [2022-12-05 21:35:47,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:47,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:35:47,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:47,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:35:47,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:35:47,922 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:47,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 624 transitions, 13280 flow. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:47,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:47,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:47,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:49,971 INFO L130 PetriNetUnfolder]: 2583/5315 cut-off events. [2022-12-05 21:35:49,972 INFO L131 PetriNetUnfolder]: For 201271/201271 co-relation queries the response was YES. [2022-12-05 21:35:49,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48951 conditions, 5315 events. 2583/5315 cut-off events. For 201271/201271 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 43558 event pairs, 333 based on Foata normal form. 56/5371 useless extension candidates. Maximal degree in co-relation 47778. Up to 2389 conditions per place. [2022-12-05 21:35:50,020 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 691 selfloop transitions, 253 changer transitions 10/954 dead transitions. [2022-12-05 21:35:50,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 954 transitions, 19735 flow [2022-12-05 21:35:50,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-05 21:35:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-05 21:35:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 216 transitions. [2022-12-05 21:35:50,021 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4114285714285714 [2022-12-05 21:35:50,021 INFO L175 Difference]: Start difference. First operand has 252 places, 624 transitions, 13280 flow. Second operand 35 states and 216 transitions. [2022-12-05 21:35:50,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 954 transitions, 19735 flow [2022-12-05 21:35:51,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 954 transitions, 19277 flow, removed 157 selfloop flow, removed 15 redundant places. [2022-12-05 21:35:51,397 INFO L231 Difference]: Finished difference. Result has 282 places, 696 transitions, 15271 flow [2022-12-05 21:35:51,398 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=12882, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15271, PETRI_PLACES=282, PETRI_TRANSITIONS=696} [2022-12-05 21:35:51,398 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 262 predicate places. [2022-12-05 21:35:51,398 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 696 transitions, 15271 flow [2022-12-05 21:35:51,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:51,398 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:51,399 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:51,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:51,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-05 21:35:51,602 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:51,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:51,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1127906678, now seen corresponding path program 14 times [2022-12-05 21:35:51,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:51,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600087269] [2022-12-05 21:35:51,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:51,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:51,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:51,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600087269] [2022-12-05 21:35:51,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600087269] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:51,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381397415] [2022-12-05 21:35:51,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:35:51,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:51,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:51,768 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:51,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-05 21:35:51,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:35:51,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:51,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:35:51,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:51,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:51,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381397415] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:51,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:51,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-12-05 21:35:51,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948291343] [2022-12-05 21:35:51,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:51,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 21:35:51,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:51,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 21:35:51,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-12-05 21:35:51,972 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:51,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 696 transitions, 15271 flow. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:51,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:51,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:51,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:35:55,133 INFO L130 PetriNetUnfolder]: 2581/5291 cut-off events. [2022-12-05 21:35:55,134 INFO L131 PetriNetUnfolder]: For 239946/239946 co-relation queries the response was YES. [2022-12-05 21:35:55,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51938 conditions, 5291 events. 2581/5291 cut-off events. For 239946/239946 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 43288 event pairs, 104 based on Foata normal form. 24/5315 useless extension candidates. Maximal degree in co-relation 51432. Up to 1163 conditions per place. [2022-12-05 21:35:55,183 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 317 selfloop transitions, 693 changer transitions 36/1046 dead transitions. [2022-12-05 21:35:55,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1046 transitions, 22780 flow [2022-12-05 21:35:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-05 21:35:55,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-12-05 21:35:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 303 transitions. [2022-12-05 21:35:55,185 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.33666666666666667 [2022-12-05 21:35:55,185 INFO L175 Difference]: Start difference. First operand has 282 places, 696 transitions, 15271 flow. Second operand 60 states and 303 transitions. [2022-12-05 21:35:55,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1046 transitions, 22780 flow [2022-12-05 21:35:56,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1046 transitions, 22062 flow, removed 294 selfloop flow, removed 11 redundant places. [2022-12-05 21:35:56,973 INFO L231 Difference]: Finished difference. Result has 339 places, 800 transitions, 18482 flow [2022-12-05 21:35:56,973 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=14653, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=18482, PETRI_PLACES=339, PETRI_TRANSITIONS=800} [2022-12-05 21:35:56,974 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 319 predicate places. [2022-12-05 21:35:56,974 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 800 transitions, 18482 flow [2022-12-05 21:35:56,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:56,974 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:35:56,974 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:35:56,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-05 21:35:57,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:57,175 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:35:57,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:35:57,175 INFO L85 PathProgramCache]: Analyzing trace with hash 780578572, now seen corresponding path program 15 times [2022-12-05 21:35:57,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:35:57,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533496434] [2022-12-05 21:35:57,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:35:57,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:35:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:35:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:57,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:35:57,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533496434] [2022-12-05 21:35:57,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533496434] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:35:57,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480416915] [2022-12-05 21:35:57,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:35:57,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:35:57,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:35:57,280 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:35:57,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-05 21:35:57,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 21:35:57,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:35:57,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:35:57,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:35:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:57,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:35:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:35:57,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480416915] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:35:57,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:35:57,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-05 21:35:57,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360620588] [2022-12-05 21:35:57,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:35:57,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:35:57,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:35:57,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:35:57,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:35:57,483 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:35:57,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 800 transitions, 18482 flow. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:35:57,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:35:57,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:35:57,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:36:00,370 INFO L130 PetriNetUnfolder]: 3040/6136 cut-off events. [2022-12-05 21:36:00,370 INFO L131 PetriNetUnfolder]: For 337272/337272 co-relation queries the response was YES. [2022-12-05 21:36:00,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64656 conditions, 6136 events. 3040/6136 cut-off events. For 337272/337272 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 50860 event pairs, 922 based on Foata normal form. 70/6206 useless extension candidates. Maximal degree in co-relation 63660. Up to 3950 conditions per place. [2022-12-05 21:36:00,435 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 820 selfloop transitions, 315 changer transitions 1/1136 dead transitions. [2022-12-05 21:36:00,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1136 transitions, 26775 flow [2022-12-05 21:36:00,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-05 21:36:00,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-05 21:36:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 231 transitions. [2022-12-05 21:36:00,436 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.39487179487179486 [2022-12-05 21:36:00,436 INFO L175 Difference]: Start difference. First operand has 339 places, 800 transitions, 18482 flow. Second operand 39 states and 231 transitions. [2022-12-05 21:36:00,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1136 transitions, 26775 flow [2022-12-05 21:36:03,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1136 transitions, 25121 flow, removed 693 selfloop flow, removed 20 redundant places. [2022-12-05 21:36:03,208 INFO L231 Difference]: Finished difference. Result has 371 places, 930 transitions, 21800 flow [2022-12-05 21:36:03,208 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=17276, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=21800, PETRI_PLACES=371, PETRI_TRANSITIONS=930} [2022-12-05 21:36:03,208 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 351 predicate places. [2022-12-05 21:36:03,208 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 930 transitions, 21800 flow [2022-12-05 21:36:03,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:36:03,209 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:36:03,209 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:36:03,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-05 21:36:03,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:36:03,409 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:36:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:36:03,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1620719076, now seen corresponding path program 16 times [2022-12-05 21:36:03,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:36:03,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642499974] [2022-12-05 21:36:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:36:03,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:36:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:36:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:03,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:36:03,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642499974] [2022-12-05 21:36:03,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642499974] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:36:03,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900682034] [2022-12-05 21:36:03,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:36:03,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:36:03,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:36:03,513 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:36:03,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-05 21:36:03,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:36:03,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:36:03,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:36:03,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:36:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:03,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:36:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:03,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900682034] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:36:03,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:36:03,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-05 21:36:03,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770267974] [2022-12-05 21:36:03,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:36:03,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 21:36:03,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:36:03,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 21:36:03,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:36:03,721 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:36:03,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 930 transitions, 21800 flow. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:36:03,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:36:03,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:36:03,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:36:07,643 INFO L130 PetriNetUnfolder]: 3423/6921 cut-off events. [2022-12-05 21:36:07,644 INFO L131 PetriNetUnfolder]: For 430382/430382 co-relation queries the response was YES. [2022-12-05 21:36:07,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74686 conditions, 6921 events. 3423/6921 cut-off events. For 430382/430382 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 58842 event pairs, 950 based on Foata normal form. 90/7011 useless extension candidates. Maximal degree in co-relation 73462. Up to 4362 conditions per place. [2022-12-05 21:36:07,719 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 755 selfloop transitions, 430 changer transitions 30/1215 dead transitions. [2022-12-05 21:36:07,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 1215 transitions, 28963 flow [2022-12-05 21:36:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-05 21:36:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-05 21:36:07,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 220 transitions. [2022-12-05 21:36:07,720 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2022-12-05 21:36:07,720 INFO L175 Difference]: Start difference. First operand has 371 places, 930 transitions, 21800 flow. Second operand 41 states and 220 transitions. [2022-12-05 21:36:07,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 1215 transitions, 28963 flow [2022-12-05 21:36:11,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1215 transitions, 28164 flow, removed 323 selfloop flow, removed 14 redundant places. [2022-12-05 21:36:11,028 INFO L231 Difference]: Finished difference. Result has 410 places, 1023 transitions, 24987 flow [2022-12-05 21:36:11,029 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=20986, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=926, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=24987, PETRI_PLACES=410, PETRI_TRANSITIONS=1023} [2022-12-05 21:36:11,029 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 390 predicate places. [2022-12-05 21:36:11,029 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 1023 transitions, 24987 flow [2022-12-05 21:36:11,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:36:11,029 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:36:11,029 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:36:11,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-05 21:36:11,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:36:11,234 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:36:11,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:36:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash 331463268, now seen corresponding path program 17 times [2022-12-05 21:36:11,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:36:11,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71395199] [2022-12-05 21:36:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:36:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:36:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:36:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:11,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:36:11,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71395199] [2022-12-05 21:36:11,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71395199] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:36:11,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152463419] [2022-12-05 21:36:11,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:36:11,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:36:11,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:36:11,342 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:36:11,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-05 21:36:11,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:36:11,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:36:11,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:36:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:36:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:11,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:36:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:11,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152463419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:36:11,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:36:11,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-05 21:36:11,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388292415] [2022-12-05 21:36:11,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:36:11,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 21:36:11,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:36:11,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 21:36:11,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:36:11,533 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:36:11,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 1023 transitions, 24987 flow. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:36:11,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:36:11,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:36:11,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:36:18,389 INFO L130 PetriNetUnfolder]: 3683/7454 cut-off events. [2022-12-05 21:36:18,390 INFO L131 PetriNetUnfolder]: For 494565/494565 co-relation queries the response was YES. [2022-12-05 21:36:18,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83478 conditions, 7454 events. 3683/7454 cut-off events. For 494565/494565 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 63963 event pairs, 1357 based on Foata normal form. 80/7534 useless extension candidates. Maximal degree in co-relation 81924. Up to 5970 conditions per place. [2022-12-05 21:36:18,469 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 973 selfloop transitions, 252 changer transitions 23/1248 dead transitions. [2022-12-05 21:36:18,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1248 transitions, 31424 flow [2022-12-05 21:36:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-05 21:36:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-05 21:36:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 166 transitions. [2022-12-05 21:36:18,470 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.40987654320987654 [2022-12-05 21:36:18,470 INFO L175 Difference]: Start difference. First operand has 410 places, 1023 transitions, 24987 flow. Second operand 27 states and 166 transitions. [2022-12-05 21:36:18,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1248 transitions, 31424 flow [2022-12-05 21:36:22,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 1248 transitions, 30977 flow, removed 171 selfloop flow, removed 19 redundant places. [2022-12-05 21:36:22,445 INFO L231 Difference]: Finished difference. Result has 425 places, 1087 transitions, 27296 flow [2022-12-05 21:36:22,446 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=24556, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=786, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=27296, PETRI_PLACES=425, PETRI_TRANSITIONS=1087} [2022-12-05 21:36:22,446 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 405 predicate places. [2022-12-05 21:36:22,446 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 1087 transitions, 27296 flow [2022-12-05 21:36:22,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:36:22,446 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:36:22,447 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:36:22,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-05 21:36:22,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-05 21:36:22,651 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:36:22,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:36:22,652 INFO L85 PathProgramCache]: Analyzing trace with hash -454921572, now seen corresponding path program 18 times [2022-12-05 21:36:22,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:36:22,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078489416] [2022-12-05 21:36:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:36:22,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:36:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:36:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:22,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:36:22,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078489416] [2022-12-05 21:36:22,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078489416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:36:22,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548661570] [2022-12-05 21:36:22,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:36:22,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:36:22,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:36:22,749 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:36:22,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-05 21:36:22,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:36:22,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:36:22,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:36:22,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:36:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:22,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:36:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:22,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548661570] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:36:22,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:36:22,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-05 21:36:22,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710031183] [2022-12-05 21:36:22,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:36:22,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:36:22,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:36:22,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:36:22,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:36:22,947 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:36:22,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 1087 transitions, 27296 flow. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:36:22,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:36:22,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:36:22,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:36:27,059 INFO L130 PetriNetUnfolder]: 3970/7965 cut-off events. [2022-12-05 21:36:27,059 INFO L131 PetriNetUnfolder]: For 556943/556943 co-relation queries the response was YES. [2022-12-05 21:36:27,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90577 conditions, 7965 events. 3970/7965 cut-off events. For 556943/556943 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 68502 event pairs, 1492 based on Foata normal form. 112/8077 useless extension candidates. Maximal degree in co-relation 88952. Up to 6640 conditions per place. [2022-12-05 21:36:27,157 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 1104 selfloop transitions, 271 changer transitions 3/1378 dead transitions. [2022-12-05 21:36:27,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1378 transitions, 35419 flow [2022-12-05 21:36:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-05 21:36:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-05 21:36:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 212 transitions. [2022-12-05 21:36:27,164 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2022-12-05 21:36:27,164 INFO L175 Difference]: Start difference. First operand has 425 places, 1087 transitions, 27296 flow. Second operand 36 states and 212 transitions. [2022-12-05 21:36:27,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1378 transitions, 35419 flow [2022-12-05 21:36:31,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 1378 transitions, 34899 flow, removed 184 selfloop flow, removed 12 redundant places. [2022-12-05 21:36:31,758 INFO L231 Difference]: Finished difference. Result has 462 places, 1192 transitions, 30912 flow [2022-12-05 21:36:31,758 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=26917, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=865, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=30912, PETRI_PLACES=462, PETRI_TRANSITIONS=1192} [2022-12-05 21:36:31,759 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 442 predicate places. [2022-12-05 21:36:31,759 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 1192 transitions, 30912 flow [2022-12-05 21:36:31,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:36:31,759 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:36:31,759 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:36:31,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-05 21:36:31,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-05 21:36:31,963 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:36:31,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:36:31,964 INFO L85 PathProgramCache]: Analyzing trace with hash -416659174, now seen corresponding path program 19 times [2022-12-05 21:36:31,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:36:31,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610055786] [2022-12-05 21:36:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:36:31,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:36:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:36:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:32,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:36:32,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610055786] [2022-12-05 21:36:32,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610055786] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:36:32,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924510811] [2022-12-05 21:36:32,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:36:32,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:36:32,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:36:32,120 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:36:32,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-05 21:36:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:36:32,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:36:32,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:36:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:32,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:36:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:32,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924510811] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:36:32,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:36:32,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-12-05 21:36:32,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747982946] [2022-12-05 21:36:32,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:36:32,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 21:36:32,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:36:32,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 21:36:32,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-12-05 21:36:32,348 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:36:32,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 1192 transitions, 30912 flow. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:36:32,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:36:32,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:36:32,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:36:37,669 INFO L130 PetriNetUnfolder]: 4415/9006 cut-off events. [2022-12-05 21:36:37,669 INFO L131 PetriNetUnfolder]: For 752632/752632 co-relation queries the response was YES. [2022-12-05 21:36:37,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107011 conditions, 9006 events. 4415/9006 cut-off events. For 752632/752632 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 80595 event pairs, 815 based on Foata normal form. 72/9078 useless extension candidates. Maximal degree in co-relation 105752. Up to 3346 conditions per place. [2022-12-05 21:36:37,788 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 701 selfloop transitions, 830 changer transitions 19/1550 dead transitions. [2022-12-05 21:36:37,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 1550 transitions, 41313 flow [2022-12-05 21:36:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-05 21:36:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-05 21:36:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 237 transitions. [2022-12-05 21:36:37,790 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4647058823529412 [2022-12-05 21:36:37,790 INFO L175 Difference]: Start difference. First operand has 462 places, 1192 transitions, 30912 flow. Second operand 34 states and 237 transitions. [2022-12-05 21:36:37,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 1550 transitions, 41313 flow [2022-12-05 21:36:44,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 1550 transitions, 40330 flow, removed 411 selfloop flow, removed 14 redundant places. [2022-12-05 21:36:44,104 INFO L231 Difference]: Finished difference. Result has 496 places, 1318 transitions, 36576 flow [2022-12-05 21:36:44,105 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=29949, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=713, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=36576, PETRI_PLACES=496, PETRI_TRANSITIONS=1318} [2022-12-05 21:36:44,105 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 476 predicate places. [2022-12-05 21:36:44,106 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 1318 transitions, 36576 flow [2022-12-05 21:36:44,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:36:44,106 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:36:44,106 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:36:44,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-05 21:36:44,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:36:44,310 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:36:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:36:44,310 INFO L85 PathProgramCache]: Analyzing trace with hash -384811536, now seen corresponding path program 20 times [2022-12-05 21:36:44,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:36:44,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902724647] [2022-12-05 21:36:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:36:44,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:36:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:36:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:44,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:36:44,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902724647] [2022-12-05 21:36:44,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902724647] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:36:44,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15351673] [2022-12-05 21:36:44,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:36:44,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:36:44,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:36:44,417 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:36:44,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-05 21:36:44,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:36:44,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:36:44,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:36:44,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:36:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:44,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:36:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:44,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15351673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:36:44,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:36:44,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-05 21:36:44,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650003158] [2022-12-05 21:36:44,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:36:44,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:36:44,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:36:44,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:36:44,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:36:44,623 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:36:44,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 1318 transitions, 36576 flow. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:36:44,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:36:44,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:36:44,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:36:49,817 INFO L130 PetriNetUnfolder]: 4652/9433 cut-off events. [2022-12-05 21:36:49,818 INFO L131 PetriNetUnfolder]: For 978565/978565 co-relation queries the response was YES. [2022-12-05 21:36:49,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119195 conditions, 9433 events. 4652/9433 cut-off events. For 978565/978565 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 84518 event pairs, 1899 based on Foata normal form. 148/9581 useless extension candidates. Maximal degree in co-relation 117956. Up to 8525 conditions per place. [2022-12-05 21:36:49,956 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 1327 selfloop transitions, 204 changer transitions 4/1535 dead transitions. [2022-12-05 21:36:49,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 1535 transitions, 43522 flow [2022-12-05 21:36:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-05 21:36:49,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-05 21:36:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 207 transitions. [2022-12-05 21:36:49,957 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2022-12-05 21:36:49,958 INFO L175 Difference]: Start difference. First operand has 496 places, 1318 transitions, 36576 flow. Second operand 36 states and 207 transitions. [2022-12-05 21:36:49,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 1535 transitions, 43522 flow [2022-12-05 21:36:57,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 1535 transitions, 42028 flow, removed 614 selfloop flow, removed 11 redundant places. [2022-12-05 21:36:57,896 INFO L231 Difference]: Finished difference. Result has 535 places, 1394 transitions, 38212 flow [2022-12-05 21:36:57,897 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=35600, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=38212, PETRI_PLACES=535, PETRI_TRANSITIONS=1394} [2022-12-05 21:36:57,897 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 515 predicate places. [2022-12-05 21:36:57,898 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 1394 transitions, 38212 flow [2022-12-05 21:36:57,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:36:57,898 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:36:57,898 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:36:57,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-05 21:36:58,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:36:58,102 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:36:58,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:36:58,103 INFO L85 PathProgramCache]: Analyzing trace with hash -862310262, now seen corresponding path program 21 times [2022-12-05 21:36:58,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:36:58,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550988718] [2022-12-05 21:36:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:36:58,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:36:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:36:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:58,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:36:58,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550988718] [2022-12-05 21:36:58,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550988718] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:36:58,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955744511] [2022-12-05 21:36:58,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:36:58,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:36:58,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:36:58,302 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:36:58,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-05 21:36:58,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-05 21:36:58,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:36:58,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:36:58,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:36:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:58,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:36:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:36:58,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955744511] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:36:58,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:36:58,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-12-05 21:36:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332899430] [2022-12-05 21:36:58,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:36:58,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 21:36:58,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:36:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 21:36:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-12-05 21:36:58,512 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:36:58,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 1394 transitions, 38212 flow. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:36:58,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:36:58,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:36:58,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:37:02,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 21:37:07,341 INFO L130 PetriNetUnfolder]: 4638/9381 cut-off events. [2022-12-05 21:37:07,341 INFO L131 PetriNetUnfolder]: For 1018085/1018085 co-relation queries the response was YES. [2022-12-05 21:37:07,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122390 conditions, 9381 events. 4638/9381 cut-off events. For 1018085/1018085 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 83710 event pairs, 362 based on Foata normal form. 22/9403 useless extension candidates. Maximal degree in co-relation 121194. Up to 2788 conditions per place. [2022-12-05 21:37:07,462 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 496 selfloop transitions, 1089 changer transitions 25/1610 dead transitions. [2022-12-05 21:37:07,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 1610 transitions, 45476 flow [2022-12-05 21:37:07,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-05 21:37:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-12-05 21:37:07,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 245 transitions. [2022-12-05 21:37:07,464 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3081761006289308 [2022-12-05 21:37:07,464 INFO L175 Difference]: Start difference. First operand has 535 places, 1394 transitions, 38212 flow. Second operand 53 states and 245 transitions. [2022-12-05 21:37:07,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 1610 transitions, 45476 flow [2022-12-05 21:37:16,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 1610 transitions, 44170 flow, removed 595 selfloop flow, removed 14 redundant places. [2022-12-05 21:37:16,806 INFO L231 Difference]: Finished difference. Result has 580 places, 1443 transitions, 41222 flow [2022-12-05 21:37:16,807 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=37084, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=41222, PETRI_PLACES=580, PETRI_TRANSITIONS=1443} [2022-12-05 21:37:16,807 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 560 predicate places. [2022-12-05 21:37:16,807 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1443 transitions, 41222 flow [2022-12-05 21:37:16,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:16,807 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:37:16,807 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:37:16,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-05 21:37:17,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-05 21:37:17,010 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:37:17,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:37:17,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1255106554, now seen corresponding path program 22 times [2022-12-05 21:37:17,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:37:17,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206440173] [2022-12-05 21:37:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:37:17,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:37:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:37:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:37:17,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:37:17,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206440173] [2022-12-05 21:37:17,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206440173] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:37:17,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474337292] [2022-12-05 21:37:17,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:37:17,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:37:17,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:37:17,104 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:37:17,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-05 21:37:17,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:37:17,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:37:17,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-05 21:37:17,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:37:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:37:17,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:37:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:37:17,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474337292] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:37:17,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:37:17,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-05 21:37:17,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488319345] [2022-12-05 21:37:17,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:37:17,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 21:37:17,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:37:17,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 21:37:17,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:37:17,283 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:37:17,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1443 transitions, 41222 flow. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:17,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:37:17,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:37:17,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:37:23,369 INFO L130 PetriNetUnfolder]: 4855/9760 cut-off events. [2022-12-05 21:37:23,369 INFO L131 PetriNetUnfolder]: For 1104605/1104605 co-relation queries the response was YES. [2022-12-05 21:37:23,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129662 conditions, 9760 events. 4855/9760 cut-off events. For 1104605/1104605 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 87088 event pairs, 1577 based on Foata normal form. 70/9830 useless extension candidates. Maximal degree in co-relation 128738. Up to 7371 conditions per place. [2022-12-05 21:37:23,503 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 1143 selfloop transitions, 481 changer transitions 21/1645 dead transitions. [2022-12-05 21:37:23,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 1645 transitions, 48613 flow [2022-12-05 21:37:23,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-05 21:37:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-05 21:37:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 171 transitions. [2022-12-05 21:37:23,504 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3931034482758621 [2022-12-05 21:37:23,504 INFO L175 Difference]: Start difference. First operand has 580 places, 1443 transitions, 41222 flow. Second operand 29 states and 171 transitions. [2022-12-05 21:37:23,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 1645 transitions, 48613 flow [2022-12-05 21:37:34,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 1645 transitions, 47044 flow, removed 557 selfloop flow, removed 19 redundant places. [2022-12-05 21:37:34,451 INFO L231 Difference]: Finished difference. Result has 596 places, 1517 transitions, 43892 flow [2022-12-05 21:37:34,452 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=39961, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=986, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=43892, PETRI_PLACES=596, PETRI_TRANSITIONS=1517} [2022-12-05 21:37:34,453 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 576 predicate places. [2022-12-05 21:37:34,453 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 1517 transitions, 43892 flow [2022-12-05 21:37:34,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:34,453 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:37:34,453 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:37:34,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-05 21:37:34,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-05 21:37:34,654 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:37:34,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:37:34,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1502936673, now seen corresponding path program 23 times [2022-12-05 21:37:34,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:37:34,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905615839] [2022-12-05 21:37:34,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:37:34,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:37:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:37:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:37:34,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:37:34,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905615839] [2022-12-05 21:37:34,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905615839] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:37:34,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266953983] [2022-12-05 21:37:34,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:37:34,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:37:34,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:37:34,773 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:37:34,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-05 21:37:34,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:37:34,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:37:34,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-05 21:37:34,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:37:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:37:34,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:37:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:37:34,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266953983] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:37:34,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:37:34,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-12-05 21:37:34,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116701346] [2022-12-05 21:37:34,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:37:34,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-05 21:37:34,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:37:34,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-05 21:37:34,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-05 21:37:34,933 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:37:34,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 1517 transitions, 43892 flow. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:34,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:37:34,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:37:34,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:37:41,473 INFO L130 PetriNetUnfolder]: 6028/12203 cut-off events. [2022-12-05 21:37:41,473 INFO L131 PetriNetUnfolder]: For 1431361/1431371 co-relation queries the response was YES. [2022-12-05 21:37:41,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167402 conditions, 12203 events. 6028/12203 cut-off events. For 1431361/1431371 co-relation queries the response was YES. Maximal size of possible extension queue 1088. Compared 113292 event pairs, 679 based on Foata normal form. 234/12433 useless extension candidates. Maximal degree in co-relation 166245. Up to 6101 conditions per place. [2022-12-05 21:37:41,652 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 1120 selfloop transitions, 717 changer transitions 153/2003 dead transitions. [2022-12-05 21:37:41,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 2003 transitions, 62009 flow [2022-12-05 21:37:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 21:37:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 21:37:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2022-12-05 21:37:41,653 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7666666666666667 [2022-12-05 21:37:41,653 INFO L175 Difference]: Start difference. First operand has 596 places, 1517 transitions, 43892 flow. Second operand 6 states and 69 transitions. [2022-12-05 21:37:41,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 2003 transitions, 62009 flow [2022-12-05 21:37:58,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 2003 transitions, 61566 flow, removed 118 selfloop flow, removed 23 redundant places. [2022-12-05 21:37:58,786 INFO L231 Difference]: Finished difference. Result has 579 places, 1717 transitions, 54098 flow [2022-12-05 21:37:58,788 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=43338, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=802, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=54098, PETRI_PLACES=579, PETRI_TRANSITIONS=1717} [2022-12-05 21:37:58,788 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 559 predicate places. [2022-12-05 21:37:58,788 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 1717 transitions, 54098 flow [2022-12-05 21:37:58,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:58,788 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:37:58,788 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:37:58,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-05 21:37:58,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-05 21:37:58,992 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:37:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:37:58,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1696554779, now seen corresponding path program 24 times [2022-12-05 21:37:58,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:37:58,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791166876] [2022-12-05 21:37:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:37:58,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:37:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:37:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:37:59,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:37:59,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791166876] [2022-12-05 21:37:59,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791166876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:37:59,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666884483] [2022-12-05 21:37:59,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:37:59,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:37:59,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:37:59,134 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:37:59,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-05 21:37:59,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:37:59,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:37:59,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-05 21:37:59,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:37:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:37:59,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:37:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:37:59,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666884483] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:37:59,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:37:59,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-12-05 21:37:59,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726434584] [2022-12-05 21:37:59,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:37:59,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 21:37:59,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:37:59,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 21:37:59,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-12-05 21:37:59,355 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:37:59,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1717 transitions, 54098 flow. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:37:59,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:37:59,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:37:59,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:38:13,482 INFO L130 PetriNetUnfolder]: 9960/20305 cut-off events. [2022-12-05 21:38:13,482 INFO L131 PetriNetUnfolder]: For 2434078/2434078 co-relation queries the response was YES. [2022-12-05 21:38:13,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282884 conditions, 20305 events. 9960/20305 cut-off events. For 2434078/2434078 co-relation queries the response was YES. Maximal size of possible extension queue 1626. Compared 202682 event pairs, 1551 based on Foata normal form. 190/20495 useless extension candidates. Maximal degree in co-relation 281270. Up to 7403 conditions per place. [2022-12-05 21:38:13,911 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 2628 selfloop transitions, 655 changer transitions 3/3286 dead transitions. [2022-12-05 21:38:13,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 3286 transitions, 106485 flow [2022-12-05 21:38:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-05 21:38:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-05 21:38:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 179 transitions. [2022-12-05 21:38:13,912 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.45897435897435895 [2022-12-05 21:38:13,912 INFO L175 Difference]: Start difference. First operand has 579 places, 1717 transitions, 54098 flow. Second operand 26 states and 179 transitions. [2022-12-05 21:38:13,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 3286 transitions, 106485 flow [2022-12-05 21:38:48,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 3286 transitions, 104864 flow, removed 766 selfloop flow, removed 10 redundant places. [2022-12-05 21:38:48,376 INFO L231 Difference]: Finished difference. Result has 587 places, 2111 transitions, 66952 flow [2022-12-05 21:38:48,377 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=53223, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=66952, PETRI_PLACES=587, PETRI_TRANSITIONS=2111} [2022-12-05 21:38:48,378 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 567 predicate places. [2022-12-05 21:38:48,378 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 2111 transitions, 66952 flow [2022-12-05 21:38:48,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:38:48,378 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:38:48,378 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:38:48,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-05 21:38:48,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-05 21:38:48,583 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:38:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:38:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash 963963275, now seen corresponding path program 25 times [2022-12-05 21:38:48,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:38:48,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516737095] [2022-12-05 21:38:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:38:48,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:38:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:38:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:38:48,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:38:48,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516737095] [2022-12-05 21:38:48,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516737095] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:38:48,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264303379] [2022-12-05 21:38:48,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:38:48,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:38:48,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:38:48,716 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:38:48,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-05 21:38:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:38:48,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-05 21:38:48,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:38:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:38:48,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:38:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:38:48,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264303379] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:38:48,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:38:48,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-12-05 21:38:48,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059621541] [2022-12-05 21:38:48,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:38:48,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 21:38:48,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:38:48,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 21:38:48,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-12-05 21:38:48,950 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:38:48,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 2111 transitions, 66952 flow. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:38:48,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:38:48,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:38:48,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:39:07,257 INFO L130 PetriNetUnfolder]: 10443/21216 cut-off events. [2022-12-05 21:39:07,257 INFO L131 PetriNetUnfolder]: For 2464314/2464314 co-relation queries the response was YES. [2022-12-05 21:39:07,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296691 conditions, 21216 events. 10443/21216 cut-off events. For 2464314/2464314 co-relation queries the response was YES. Maximal size of possible extension queue 1723. Compared 212966 event pairs, 1613 based on Foata normal form. 224/21440 useless extension candidates. Maximal degree in co-relation 294298. Up to 7591 conditions per place. [2022-12-05 21:39:07,645 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 2770 selfloop transitions, 814 changer transitions 3/3587 dead transitions. [2022-12-05 21:39:07,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 3587 transitions, 115755 flow [2022-12-05 21:39:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-05 21:39:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-12-05 21:39:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 360 transitions. [2022-12-05 21:39:07,646 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2022-12-05 21:39:07,646 INFO L175 Difference]: Start difference. First operand has 587 places, 2111 transitions, 66952 flow. Second operand 58 states and 360 transitions. [2022-12-05 21:39:07,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 3587 transitions, 115755 flow [2022-12-05 21:39:49,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 3587 transitions, 113288 flow, removed 1056 selfloop flow, removed 13 redundant places. [2022-12-05 21:39:49,684 INFO L231 Difference]: Finished difference. Result has 643 places, 2326 transitions, 74919 flow [2022-12-05 21:39:49,685 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=65138, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=642, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=74919, PETRI_PLACES=643, PETRI_TRANSITIONS=2326} [2022-12-05 21:39:49,686 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 623 predicate places. [2022-12-05 21:39:49,686 INFO L495 AbstractCegarLoop]: Abstraction has has 643 places, 2326 transitions, 74919 flow [2022-12-05 21:39:49,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:39:49,686 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:39:49,686 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:39:49,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-05 21:39:49,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:39:49,887 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:39:49,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:39:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2047980461, now seen corresponding path program 26 times [2022-12-05 21:39:49,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:39:49,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153856462] [2022-12-05 21:39:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:39:49,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:39:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:39:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:39:50,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:39:50,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153856462] [2022-12-05 21:39:50,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153856462] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:39:50,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889267377] [2022-12-05 21:39:50,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:39:50,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:39:50,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:39:50,012 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:39:50,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-05 21:39:50,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:39:50,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:39:50,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-05 21:39:50,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:39:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:39:50,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:39:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:39:50,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889267377] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:39:50,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:39:50,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-12-05 21:39:50,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082362222] [2022-12-05 21:39:50,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:39:50,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-05 21:39:50,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:39:50,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-05 21:39:50,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-12-05 21:39:50,279 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:39:50,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 2326 transitions, 74919 flow. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:39:50,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:39:50,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:39:50,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:06,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 21:40:40,379 INFO L130 PetriNetUnfolder]: 13129/27459 cut-off events. [2022-12-05 21:40:40,379 INFO L131 PetriNetUnfolder]: For 4917221/4917221 co-relation queries the response was YES. [2022-12-05 21:40:40,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419453 conditions, 27459 events. 13129/27459 cut-off events. For 4917221/4917221 co-relation queries the response was YES. Maximal size of possible extension queue 2016. Compared 291299 event pairs, 878 based on Foata normal form. 216/27675 useless extension candidates. Maximal degree in co-relation 417320. Up to 5921 conditions per place. [2022-12-05 21:40:41,093 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 1599 selfloop transitions, 2841 changer transitions 82/4522 dead transitions. [2022-12-05 21:40:41,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 4522 transitions, 148738 flow [2022-12-05 21:40:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-12-05 21:40:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-12-05 21:40:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 644 transitions. [2022-12-05 21:40:41,097 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.46164874551971324 [2022-12-05 21:40:41,097 INFO L175 Difference]: Start difference. First operand has 643 places, 2326 transitions, 74919 flow. Second operand 93 states and 644 transitions. [2022-12-05 21:40:41,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 4522 transitions, 148738 flow [2022-12-05 21:41:57,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 4522 transitions, 146078 flow, removed 1211 selfloop flow, removed 16 redundant places. [2022-12-05 21:41:58,064 INFO L231 Difference]: Finished difference. Result has 742 places, 3376 transitions, 116818 flow [2022-12-05 21:41:58,065 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=72721, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1830, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=116818, PETRI_PLACES=742, PETRI_TRANSITIONS=3376} [2022-12-05 21:41:58,066 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 722 predicate places. [2022-12-05 21:41:58,066 INFO L495 AbstractCegarLoop]: Abstraction has has 742 places, 3376 transitions, 116818 flow [2022-12-05 21:41:58,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:41:58,066 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:41:58,066 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:41:58,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-05 21:41:58,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:41:58,269 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:41:58,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:41:58,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1192587099, now seen corresponding path program 27 times [2022-12-05 21:41:58,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:41:58,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279436132] [2022-12-05 21:41:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:41:58,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:41:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:41:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:41:58,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:41:58,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279436132] [2022-12-05 21:41:58,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279436132] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:41:58,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317693293] [2022-12-05 21:41:58,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:41:58,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:41:58,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:41:58,388 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:41:58,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-05 21:41:58,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-05 21:41:58,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:41:58,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-05 21:41:58,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:41:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:41:58,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:41:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:41:58,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317693293] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:41:58,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:41:58,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-12-05 21:41:58,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866880489] [2022-12-05 21:41:58,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:41:58,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-05 21:41:58,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:41:58,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-05 21:41:58,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-12-05 21:41:58,679 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:41:58,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 742 places, 3376 transitions, 116818 flow. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:41:58,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:41:58,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:41:58,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:42:05,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 21:42:20,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 21:42:23,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 21:42:38,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 21:42:40,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 21:42:42,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 21:43:34,547 INFO L130 PetriNetUnfolder]: 13413/28015 cut-off events. [2022-12-05 21:43:34,547 INFO L131 PetriNetUnfolder]: For 7398265/7398265 co-relation queries the response was YES. [2022-12-05 21:43:34,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479870 conditions, 28015 events. 13413/28015 cut-off events. For 7398265/7398265 co-relation queries the response was YES. Maximal size of possible extension queue 2043. Compared 297061 event pairs, 474 based on Foata normal form. 94/28109 useless extension candidates. Maximal degree in co-relation 477332. Up to 5939 conditions per place. [2022-12-05 21:43:35,084 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 904 selfloop transitions, 3605 changer transitions 74/4583 dead transitions. [2022-12-05 21:43:35,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 857 places, 4583 transitions, 162287 flow [2022-12-05 21:43:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-12-05 21:43:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-12-05 21:43:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 610 transitions. [2022-12-05 21:43:35,086 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3505747126436782 [2022-12-05 21:43:35,086 INFO L175 Difference]: Start difference. First operand has 742 places, 3376 transitions, 116818 flow. Second operand 116 states and 610 transitions. [2022-12-05 21:43:35,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 857 places, 4583 transitions, 162287 flow [2022-12-05 21:45:36,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 826 places, 4583 transitions, 154318 flow, removed 3758 selfloop flow, removed 31 redundant places. [2022-12-05 21:45:36,419 INFO L231 Difference]: Finished difference. Result has 858 places, 3953 transitions, 138149 flow [2022-12-05 21:45:36,422 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=109877, PETRI_DIFFERENCE_MINUEND_PLACES=711, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3028, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=138149, PETRI_PLACES=858, PETRI_TRANSITIONS=3953} [2022-12-05 21:45:36,423 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 838 predicate places. [2022-12-05 21:45:36,423 INFO L495 AbstractCegarLoop]: Abstraction has has 858 places, 3953 transitions, 138149 flow [2022-12-05 21:45:36,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:45:36,423 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:45:36,423 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:45:36,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-05 21:45:36,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-05 21:45:36,631 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:45:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:45:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1331598461, now seen corresponding path program 28 times [2022-12-05 21:45:36,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:45:36,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683751631] [2022-12-05 21:45:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:45:36,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:45:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:45:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:45:36,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:45:36,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683751631] [2022-12-05 21:45:36,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683751631] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:45:36,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143374805] [2022-12-05 21:45:36,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:45:36,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:45:36,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:45:36,749 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:45:36,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-05 21:45:36,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:45:36,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:45:36,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-05 21:45:36,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:45:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:45:36,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:45:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:45:37,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143374805] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:45:37,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:45:37,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-12-05 21:45:37,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549603464] [2022-12-05 21:45:37,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:45:37,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 21:45:37,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:45:37,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 21:45:37,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-12-05 21:45:37,009 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:45:37,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 858 places, 3953 transitions, 138149 flow. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:45:37,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:45:37,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:45:37,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:45:42,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 21:46:35,345 INFO L130 PetriNetUnfolder]: 15705/33060 cut-off events. [2022-12-05 21:46:35,345 INFO L131 PetriNetUnfolder]: For 11787073/11787073 co-relation queries the response was YES. [2022-12-05 21:46:36,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595589 conditions, 33060 events. 15705/33060 cut-off events. For 11787073/11787073 co-relation queries the response was YES. Maximal size of possible extension queue 2418. Compared 361165 event pairs, 2119 based on Foata normal form. 640/33700 useless extension candidates. Maximal degree in co-relation 592780. Up to 9296 conditions per place. [2022-12-05 21:46:36,909 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 2869 selfloop transitions, 2329 changer transitions 91/5289 dead transitions. [2022-12-05 21:46:36,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 931 places, 5289 transitions, 188430 flow [2022-12-05 21:46:36,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-05 21:46:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-12-05 21:46:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 461 transitions. [2022-12-05 21:46:36,910 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4097777777777778 [2022-12-05 21:46:36,910 INFO L175 Difference]: Start difference. First operand has 858 places, 3953 transitions, 138149 flow. Second operand 75 states and 461 transitions. [2022-12-05 21:46:36,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 931 places, 5289 transitions, 188430 flow Received shutdown request... [2022-12-05 21:49:22,855 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 21:49:22,866 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-05 21:49:22,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-05 21:49:22,880 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 21:49:23,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:49:23,067 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-12-05 21:49:23,068 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-05 21:49:23,068 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-05 21:49:23,068 INFO L458 BasicCegarLoop]: Path program histogram: [28, 4, 1] [2022-12-05 21:49:23,071 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 21:49:23,071 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 21:49:23,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 09:49:23 BasicIcfg [2022-12-05 21:49:23,072 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 21:49:23,073 INFO L158 Benchmark]: Toolchain (without parser) took 838642.57ms. Allocated memory was 184.5MB in the beginning and 4.1GB in the end (delta: 3.9GB). Free memory was 161.5MB in the beginning and 2.1GB in the end (delta: -1.9GB). Peak memory consumption was 3.7GB. Max. memory is 8.0GB. [2022-12-05 21:49:23,073 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 127.9MB. Free memory is still 105.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 21:49:23,073 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.43ms. Allocated memory is still 184.5MB. Free memory was 161.1MB in the beginning and 150.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-12-05 21:49:23,073 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.61ms. Allocated memory is still 184.5MB. Free memory was 149.9MB in the beginning and 148.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-05 21:49:23,073 INFO L158 Benchmark]: Boogie Preprocessor took 28.19ms. Allocated memory is still 184.5MB. Free memory was 148.5MB in the beginning and 147.2MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-05 21:49:23,073 INFO L158 Benchmark]: RCFGBuilder took 317.21ms. Allocated memory is still 184.5MB. Free memory was 147.2MB in the beginning and 162.0MB in the end (delta: -14.9MB). Peak memory consumption was 15.9MB. Max. memory is 8.0GB. [2022-12-05 21:49:23,074 INFO L158 Benchmark]: TraceAbstraction took 838074.87ms. Allocated memory was 184.5MB in the beginning and 4.1GB in the end (delta: 3.9GB). Free memory was 161.6MB in the beginning and 2.1GB in the end (delta: -1.9GB). Peak memory consumption was 3.7GB. Max. memory is 8.0GB. [2022-12-05 21:49:23,074 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 127.9MB. Free memory is still 105.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 178.43ms. Allocated memory is still 184.5MB. Free memory was 161.1MB in the beginning and 150.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.61ms. Allocated memory is still 184.5MB. Free memory was 149.9MB in the beginning and 148.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.19ms. Allocated memory is still 184.5MB. Free memory was 148.5MB in the beginning and 147.2MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 317.21ms. Allocated memory is still 184.5MB. Free memory was 147.2MB in the beginning and 162.0MB in the end (delta: -14.9MB). Peak memory consumption was 15.9MB. Max. memory is 8.0GB. * TraceAbstraction took 838074.87ms. Allocated memory was 184.5MB in the beginning and 4.1GB in the end (delta: 3.9GB). Free memory was 161.6MB in the beginning and 2.1GB in the end (delta: -1.9GB). Peak memory consumption was 3.7GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 71 PlacesBefore, 20 PlacesAfterwards, 70 TransitionsBefore, 15 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 32 TrivialYvCompositions, 19 ConcurrentYvCompositions, 4 ChoiceCompositions, 55 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 266, independent: 262, independent conditional: 262, independent unconditional: 0, dependent: 4, dependent conditional: 4, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 266, independent: 262, independent conditional: 0, independent unconditional: 262, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 266, independent: 262, independent conditional: 0, independent unconditional: 262, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 266, independent: 262, independent conditional: 0, independent unconditional: 262, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 266, independent: 262, independent conditional: 0, independent unconditional: 262, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 266, independent: 262, independent conditional: 0, independent unconditional: 262, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 24, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 266, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 266, unknown conditional: 0, unknown unconditional: 266] , Statistics on independence cache: Total cache size (in pairs): 412, Positive cache size: 408, Positive conditional cache size: 0, Positive unconditional cache size: 408, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 838.0s, OverallIterations: 33, TraceHistogramMax: 4, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 819.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 6585 SdHoareTripleChecker+Valid, 35.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6585 mSDsluCounter, 557 SdHoareTripleChecker+Invalid, 33.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 422 mSDsCounter, 1106 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18973 IncrementalHoareTripleChecker+Invalid, 20084 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1106 mSolverCounterUnsat, 135 mSDtfsCounter, 18973 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2719 GetRequests, 1466 SyntacticMatches, 59 SemanticMatches, 1194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22693 ImplicationChecksByTransitivity, 90.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138149occurred in iteration=32, InterpolantAutomatonStates: 951, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 1105 NumberOfCodeBlocks, 1094 NumberOfCodeBlocksAsserted, 104 NumberOfCheckSat, 1549 ConstructedInterpolants, 0 QuantifiedInterpolants, 9828 SizeOfPredicates, 85 NumberOfNonLiveVariables, 4229 ConjunctsInSsa, 413 ConjunctsInUnsatCore, 95 InterpolantComputations, 3 PerfectInterpolantSequences, 67/745 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown